gearboy_libretro: a Game Boy (Color) emulator for libretro (#2345)

games-emulation/gearboy_libretro/gearboy_libretro-2.5_20180313.recipe

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+SUMMARY="A port of Gearboy, a Nintendo Game Boy emulator to the libretro API"
+DESCRIPTION="Gearboy is a Nintendo Game Boy / GameBoy Color emulator written \
+in C++. It features highly accurate CPU emulation, accurate instruction and \
+memory timing, and accurate LCD controller emulation."
+HOMEPAGE="http://www.ignaciosanchez.me/projects/gearboy/"
+COPYRIGHT="2012-2018 Ignacio Sánchez, the libretro team"
+LICENSE="GNU GPL v3"
+REVISION="1"
+srcGitRev="0ec8fad8d1030d50699cd7b2beaa15bd609a7d73"
+SOURCE_URI="https://github.com/libretro/Gearboy/archive/$srcGitRev.tar.gz"
+CHECKSUM_SHA256="adcca02259cbb77f88e715febcb4589fc975589c80dfdd77aa199eda408ba0a4"
+SOURCE_FILENAME="gearboy-libretro-${portVersion/_/-}-$srcGitRev.tar.gz"
+SOURCE_DIR="Gearboy-$srcGitRev"
+ADDITIONAL_FILES="gearboy_libretro.info.in"
+
+ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	gearboy_libretro$secondaryArchSuffix = $portVersion
+	addon:gearboy_libretro$secondaryArchSuffix = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	retroarch$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	"
+
+BUILD()
+{
+	sed -e "s/@DISPLAY_VERSION@/v${portVersion/_/-}/" \
+		$portDir/additional-files/gearboy_libretro.info.in \
+		> gearboy_libretro.info
+	cd platforms/libretro
+	make $jobArgs
+}
+
+INSTALL()
+{
+	install -m 0755 -d "$docDir"
+	install -m 0644 -t "$docDir" LICENSE README.md
+	install -m 0755 -d "$addOnsDir"/libretro
+	install -m 0644 -t "$addOnsDir"/libretro \
+		gearboy_libretro.info \
+		platforms/libretro/gearboy_libretro.so
+}